I just came across this game in my collection and it has slapped on the front of it a sticker that says "Property of NMI 4820- 150th Avenue N.E. Redmond, WA 98052 USA" and on the back another sticker that says "Not for Resale Demo Only Property of Nintendo". Does this have any kind of value more so than a retail copy would? I'm just curious about the whole matter, any information is greatly appreciated.